Burner.



J. ZANDER.

BURNER.

APPLICATION FILED MAY 5, 1913.

1, 1 G4,,60 1 0 v Patented July 21, 1914 2 SHEETS-SHEET 1.

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JOHN ZANIDEB, OF CHICAGO, ILLINOIS.

BURNER.

The present invention relates to a burner.

more particularly adapted to that type of furnaces known as oven or annealing fur-' naces.

The ob ects of the present invention are to arrange the burners for the furnace and to construct the conduits for the air and gas so as to conduct the air and gas separately and in an uncommingled state to the interior of the main heating chamber wherethe combustion takes place.

A further ob ect of the invention 1s to preheat the a1r of the combustion mixture prior to the time of combustion thereby raising the temperature at the point of combustion a proportion equal to the degree of preheating of the air.

A further object of the invention is to utilize the gases passing from the main heating chamber to effect this preheating of the air.

The invention further consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawings: F igure'l is a front elevation of an oven provided with the burner of the present invention; Fig. 2 a cross section on line 22 of Fig. 3, looking in the direction of the arrow; Fig. 3 a sectional plan view of the parts shown in Fig. 2; Fig. 4: a section on line 4-4 of Fig. 1 looking in the direction of the arrow; Fig. 5 a cross section through the burner casing taken at the point of communication of the main air and gas supply pipes with said casing; and Fig. 6 a cross section through the burner casing showing the construction of the burner and the relation of the various portions of the burner to the air and gas passages within the casing.

The burner of the present invention, as heretofore stated, is well adapted for use with that type of furnace known as an oven furnace and is used in operations similar to the hardening and annealing of metals, etc. In this type of oven it is of the utmost importance to obtain a high temperature; that is, many of the metals will not be acted upon so as to receive the hardening and annealing Specification of Letters Patent.

Application filed May 5, 1913.

Patented an 21, 1am.

Serial No. 765,663.

treatment before a temperature of around twenty-four hundred degrees 1s obtained.

to obtain this degree of heat, and the primary object of the invention is to construct a burner so as to obtain a high temperature without consuming any more gas than is consumed ordinarily.

Referring to the drawings, and particularly to Fig. 1, the furnace with which the burner is shown asapplied consists of a base 7 of any suitable size and configuration and supported on this base is what may be termed the body portion 8 of the furnace. The body portion is made of any suitable material and is provided with an opening in its front wall intended to be closed by a door 9 operated by suitable means. The irr terior of the body portion. 8 is divided into a main heating chamber 10 of suitable size and a preheating chamber 11, preferably located below the main heating chamber. Communication is established between this main heating chamber and the preheating chamber by means of a passage 12 and a pas sage 13.

The preheating chamber has located approximately centrally thereof a division wall 141- which as will be seen by referring to Fig. 3, does not extend the entire length of said chamber, but is terminated so as to leave a passage 15 therein. It might be said that this cross wall 14 divides the heating chamber into a compartment 16 and a compartment 17 which are in communication with one another through the medium of the passage 15. It will be noted that the passage 12 is in communication with the compartment 16 and the passage 13 is in communication. with the compartment 17. Located within the compartment 16 is an air pipe 18 which winds back and forth therein and located within the compartment 17 is an air pipe 19 which winds back and forth therein. The pipes 18 and 19 are connected by a suitable union 20 with a main air supply pipe 21, (see Fig. 1), and the passage of air through this main supply pipe may be controlled by means of a suitable valve 22.

Located upon opposite sides of the body portion of the furnace are housings or casings 23, each similar in style and construction, and each of these housings or casings is divided in its interior by means of a series of vertical division walls 24, (see Fig.

It has been difficult in this type of furnace .and each consists ofan outer pipe'or con air passage 27 of the casing and serves to conduct air to the heating chamber, and the K "passage' w '1s lII- C01I]LTII11I11Cfl.t1OI1' W1l3'h the gas 4:), which extend longitudinally thereof d from end to end thereof and divide the inare intended to receive the supplypfgas,

and the intermediate chamber27 isintended to-receive the supply 'of'air. The pipes 18 and 19 extend to the outside ofthe casing and commhnicate with the chamber 27 as more clearly'shownin Figs. 3 and 5. In

these --figures it-will be seen that a flanged plate 28 is afiixed to the lower face of the asing throughthe-medium of Suitable locking membe'rs 29. The end of the air pip s 18 and 19 areentered into thisii-an-geplate.

. It: isunderstood there is one of thesefiange plates for each of the housings, 23', and that the plate-on oneof thehousings 23 receives the pipe 18 and the plateonthe otherhous- :ing 23 receives thepipe 19,

'Byreferring to Fig. 5 it will be'seen that the *outer walls of the housings '23 are cut away at the point where the plates 28 are attached thus providinga passage 30 to permit the-entrance of airi-nto the "channels or passages 27 of -the casings 23. "Plates 31 si r'nilar to the plates 28 are attached to the :upperfa'ces-of the housings'23, one for each housing and these plates each-receive a gas pipe 32. By referring to Fig. 1 itwill be -seen'that'there isone of these gas pipes for each casing" 23. -By referringto' Fig. 5' it willbe seen that the upper walls ofthe eas- 23 are cut awaywhere the plates 31 are 40 attached-to provide passages33 so that communicatio betWeen" the gas-pipes '32 and ":the chambers 25 and 260f thehousings are established. V

' A series of conductors 34 are supported in the cross walls of thehousin'gs-or casings-23,

ductor -35, an intermediate pipe or conductor 36,- amt-an inner pipe'or conduct-M37.

The pipe 37' is --incommunication with the chamber 26, the pipe '36- is in communication with the chamber 27, and the pipe 35 is-in *communication with the chamber 25'. It

willwibe; noticedthat' each of the pipes is :spaced .away' fromeach other so' tl1at an 2ou=terpassage 88, an ln-termediate passage 39, and an inner passage lO-cis provided.

The passage 38 i's'in communication with the gas chamber 25 of-"the casing and serves to conduct gas to the heating chamber, the chamber 39 is in communication-With the chamber "26 of the oa'sing and also *serves to conduct gas to theheating chamber.

the combustion.

comp artments.

I The construction comprising the casings 23, division walls 24, passages 25, 26, and 27 together with the conductors 84, constitute what is termed the burner for the furonace.

, Fromthe foregoing it will be seen that the air and gas are conducted separately and in an uncommingled state until they finally emerge from the burner and pass into the combustion chamber. The point of combustion is therefore-at the outer edge of the burner, and thus no diminution in the efli- 'ci'ency of'the heat is brought about by reason of-thecombustiontaking place at a point removed from the main heating chamber. It will be remembered thatthe air enters the chamber 27 in a preheated condition. Therefore when the combustion takes place the combustionmixtureconsists of a volume of air already preheated to a certain degree and a volume of gas. It is obvious that under these conditions a greater degree of heat will begivenofl" by thecombustion than would be-the "case if air which was not preheated "were used, since in that case the heat neces saryto'bring the air up to a certain temperature would have to be entirely drawn from the heat of combustion, whereas in the present ca'sethe-raising of-the air to this temper atj'ure is accomplished by means of a preheating and a less volume of heat is drawn 'from the heat ofcombu stion to raise the air to the desired degree. It will also be seen "from-the foregoing that I use only the gases which are drawn off from the main heating chamber for the purpose 'of'eflecting this preheating operation and thus make use "of a'waste'productto increase the efficiency of 12-and13 inthe manner described, the heat "from the main heating chamber is drawn into the compartment 16 at its rear, is

-'s ucked through said compartment, thence through the passage 15 and into the compartment 17 where it is joined by theiheat cor'ning through the passage 13. Thus we have a travel ."of heat through the compart- -ments 16 and 17 which is approximately of equal degree; that is, any diminution in the heat coming through the passage 12 which *i'n-ig'ht be caused by reason of its travel through the compartment 16 will be made up by the fresh-heat coming from the passage "13, so- 'that the gas which travels through the compartment 17 hasapproximately the same degree as that-traveling through the compartment 16.

A-'st-a ck 41 of suitable construction is in comiriunication with the compartment 17 at the rear en d' thereof and this stack provides the-requisite outlet to draw oil the gases from the compartments 16 and 17 and maintain' the circulation of heat through these By the arrangement previously described the superheated air trav- By locating thev passages eling through the chamber 27 of the casings 23, as well as through the passage 39 will tend to raise the temperature of the gas passing through the chambers 25 and 26 of the casings 23 as well as the passages 38 and 40, so that these gases, when combustion takes place, will also be raised to a temperature higher than would otherwise be the case.

I claim:

1. A burner comprising a casing, a plural ity of division walls in sald casing extending longitudinally thereof and dividing the interior of the casing into separate gas and air passages, plates secured to the upper and lower faces of said casing, an air supply pipe entered into one of said plates, a gas supply pipe entered into the other of said plates, said casing being cut away at the point of attachment of one of said plates and in alinement with the air passage to provide communications between the air pipe and the air passage, and said casing also being cut away at the point of attachment of the other of said plates and in alinement with the gas passage to provide communication between the gas pipe and gas passage, and conductors mounted in the walls of said casing, said conductors establishing a series of passages at right angles to said casing passages, each conductor passage communicating with a casing passage, substantially as described.

2. A burner comprising a casing, a plurality of division Walls in said casing eX- tending longitudinally thereof, and dividing the interior of the easing into a separate air passage and a separate gas passage, means on said casing providing a supplemental chamber, means establishing communication between the supplemental chamber and air passage, a main air supply pipe communicating with the supplemental chamber, a second supplemental chamber on said casing, means establishing communication between the second supplemental chamber and gas passage, a main gas supply pipe communicating with the second supplemental chamber and conductors mounted in the walls of said casing, said conductors establishing a series of passages at right angles to said casing passages, and each conductor passage communicating with a casing passage, substantially as described.

JOHN ZANDER.

Witnesses:

lVM. P. BOND, EPHRAIM BANNING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

